Pretty sure it’s not removed, they just aren’t accepting any changes from the developer for the 6.13 cycle

Anyone have any comparisons of this to Ardour?

There are apps made for linux that don’t work with android, and there are apps made for android that don’t work with linux. That’s enough for me to consider them different

Also android just doesn’t use the basic mainline kernel which is what most people want when they say “linux phone”

I don’t daily drive one but I’ve been keeping a close eye on it and here’s my opinions: postmarketos seems to have the most momentum out of any distro (you can see device support here). I do believe it will be viable eventually as a lot of work is actively being done. This month they announced two grants that were accepted for 4g volte calling and firefox on mobile improvements. They are also working on porting systemd to alpine so that gnome mobile and plasma mobile can be run without any workarounds. Also the oneplus6/6t seems to be the most hopeful for a daily driver.

tldr: I don’t think it’s currently viable but work and money is currently being put towards projects to fix that